Hi Youwang,
first of all have a look at this discussion: http://scn.sap.com/thread/3292267 about the same topic. Please have also a look at the sap help for more detail about the ssl setup on as java:
Futhermore check if the sapcrypto.dll ist installed in the exe directory.
http://help.sap.com/saphelp_nw73/helpdata/en/49/2371abbf5a1902e10000000a42189c/content.htm
br,
fabian